Radiant and reflector adjusting mechanism for projection apparatus



March 3, 1931.

R. M. HILL 1, 5,169

RADIANT AND REFLECTOR ADJUSTING MECHANISM FOR PROJECTION APPARATUS Filed July 16 1926 3 Sheets-Sheet l w NTQR A I %a win? AT TO RNEY March 3, 1931. R. M. HILL 1,795,169

RADIANT AND REFLECTOR ADJUSTING MECHANISM FOR PROJECTION APPARATUS Filed July 16, 26 s S hets-Sheet 2 QI v 2-1 gwummmmgMI; Z

10 1 l 7 6 I 9 s munmmun M Z A llllllllllll" ATTORNEY v March 3, 1931. R. M. HILL 1,795,169 RADIANT AND REFLECTOR ADJUSTING MECHANISM FOR PROJECTION APPARATUS Filed July 16, 1926 3 Sheets-Sheet 3 ATTORN EY Patented Mar. 3, 1931 l t h srras noonn 1a. HILL, or WASHINGTON, DISTRICT or c'oLuMBIA BIADIANT AND REFLECTOR ADJUSTING MECHANISM FOR PROJECTION .AI-PI iE'LRATITS Application filed' m .16,

This invention relates to stereopticons,

spotlights ando-ther forms of projection apparatus, more especially it is directed to a lam house mechanism for ei'lectin the various adjustments of radiant and reflectorin cidental to focusing.

One ob ect of this invention 1s to provide a device permi ting the multi-tocusing adustments of radiant and reflector as described in my Patent No. 1,631,529, issued June 7, 1927, but eliminating to a large extent the numerous castings, controls and associated parts heretofore required for these movements.

Another object of this invention is to provide a radiant and reflector adjusting mechanism including swivelly mounted turrets manually rotatable in one direction and autoinatically operable in the other.

Other objects of this invention are to simplify the operation of adjusting radiant and reflector by arranging their controls in an easily remembered and predetermined order; provision of means to relieve the rack H and pinion mechanism of the weight of the turret and to furnish an apparatus having interchangeable parts to simplify repairs and reduce cost of maintenance.

With these and other objects in view this invention consists in certain novel details of construction, combination and arrangement of parts to be more specifically set forth and claimed.

Briefly stated this invention embodies telescopically associated, swivelly mounted,

axially aligned upper and lower radiant and reflector supporti gturrets, rotatably positioned upon a longitudinally operable carriage. Control rods operably connected with the tur ets, carriage and reflector to permit the requisite ustment thereof and automatic trol rods functionin'g' to automatically return the turrets to initial position. Referring-more particularly to the ace panying drawings 7 in which correspondii'ig parts are indicated by similar reference characters:

means in connection with certain ofthe' C011".

Fig. 5 is a fragnienta view taken along the lines 22 of Fig. 2, and v llhg. 6 1s .a fragmentary perspect1ve of the lower rack support, rack, lower turret'and lower arcuate adjusting rod.

sectional top plan In many of the familiar types oii'adjusting fixtures used in projection apparatus that utilize the incandescent light instead of the arc, the adjustmentsof the reflector and the luminant are so complex that it makes it dif ficult to adjust the same to their proper relative positions for focusing. v

It is therefore the aim and purpose of this invention to provide an adjusting means which will be extremely simple in construc-' tion, having few parts, some of which can be made interchangeablaand thus not only reduce the 'cost of manufacture and replacement, but also to provide an apparatus which is easily operated. v.

In the illustrated embodiment characterizing this invention, a carria e consisting ot a base (1) is slidably mounted uponthe tracks (2) by means of three runners (3) which pro- 7 ject from opposite sides of the base. These tracks are mounted on the base of the lamp house (4:), being'h'eld thereto by the project- ,ing lugs (5) and permitof a longitudinal movement of the carriage thereon.

Centrally located at the rear of the carriage base (1) is a perpendicularly project ing lug with the screw (7) formed at theinner end 6.) tapped for threaded engagement of controlrod 8) .i- The control rod is mountv Fig. 1 is a perspective View of the assembledfixture ed within a circularly drilled opening in a lug lamp houseli Thelug (9) is drilled for the reception of a screw (10) the end of which fits into a circular groove (11) cut in the control rod (8), thus allowing the control rod- V whichprojects from the base ofthe i to rot-ate within the lug, but preventing the longitudinal movement thereof, so that by rotation of the control rod (8) its threaded end (7) produces a longitudinal movement of the carriage.

Centrally located in respect to the base (1) of the carriage and projecting perpendicularly thereto is a cylindrical bearing (12). Near the upper extremity of this hearing (12) are two cylindrical lugs (13) and (14) which project rearwardly, their central axes being parallel to the plane of the base. These lugs are joined to each other and to the bearing and base by suitable reinforcing webs.

One of these lugs (13) is tapped to receive the threaded end (15) ofthe control rod (16), and the other lug (14) is circularly drilled to receive the control rod (17) which is cut at its end to form a pinion (18), the func tion of which will hereinafter be described. The pinion (18) of the control rod (17) is held in position within the lug (14) by means of the machine screw (19), the end of which projects into a circular groove (20) cut in the control rod (17 as shown in F ig. 3.

Rigidly attached at the front of the cylindrical bearing (12) by machine screws (21) is a curved leaf spring (22) which bend backward, its free end terminating a shoi distance beyond the lug (13). The upper end of the cylindrical bearing (12) is tapered or stepped down at (23) as shown in Figs. 3 and 6, to a smaller diameter for the reception of the coil spring (24) the purpose of which will be hereinafter described.

The cylindrical bearing (12) mounting for the lower turret turret is mounted upon a shaft (26) a lower end of which is cut a circular racl' The shaft (26) of the lower turret slidably mounted y it-hin the cylind -car bearing 12), the teeth of the rack (27) intermeshing' with those of the pinion (18) cut on the end of the control rod (17).

Thus rotation of the control rod (17) raises and lowers the shaft (26) within the cylindrical bearing; (12). The upper end of shaft (26) is shaped to form a turret which consists of a cylindrical base (28), having near its lower end a laterally projecting arm (29), terminating in a cyl This 111;; (30) is drilled to receive the circular rod (31), which projects therefrom in a perpendicular direction, its central axis .-eing parallel to that of the shaft (26 said 'od passing; downward between the free end of leaf spring (22) and theend of control rod (16),.

N ear the lower end of the cylindrical body (28), of turret (25) and formedtangential thereto is a bracket supporting base (32), to which is attached the incandescent lamp bracket (33). This bracket (33)is insulated from the base (32) by means of the insulating plate 4) and attached to said base by ,ndrical lug means of the machine screws (35), as is fully described in my Patent No. 1 631,1." 29, issued June T, 192?.

The lower end of the cylindrical body (28) of the turret is stepped down to a cylin der of z-rnialler diameter at (26), for the reception of the coil spring which sur rounds the shaft (26), and is held under compix. on between the cylindrical bearing (12) and the turret (25). V

lit the upper end of the cylindrical body (28) of the lower turret are formed cy l 'cal lugs (37), and (38) which project ill; their central axes being parallel lane of the base. These lugs are joined h other and to the turret (2 by suits; reinforcing webs.

ne of these lugs (37) is tapped to receive t eaded end (39) of the control rod (40), 0 er lug (38) is circularly drilled to receive the control roe (41) which is cut at its on o form a pinion (42), the function of lllci, will be hereinafter described. The pinion (42) of the control rod (41) is held in DOS'lL-iOil within the lug by means of the ma ine screw (43), the end of which projects snown in Fig. 3.

.ed at the front of the cylinf the lower turret (25) by (45), is a curved leaf spring backward, its free end terdistance beyond the lug upper end of the cylindrical body a shown in Fig. 3, to a smaller diter fo the reception of the coil spring the purpose of which will hereinafter cescribed. Tie c li--drical body of the lower turret (25 is internally drilled for the reception of the shaft (49) of the upper turret which is slidably mounted therein. On the lower end of shaft (49) is cut a circular raclt (51) which intermeshes with the teeth of the pinion (42) cut on the end of the control rod (41). Thus rotation of the rod (41) raises and lowers the shaft (49) within the lower turret The upper end of shaft (49) is shaped to form the upper turret which consists of a flat cylindrical base 52) having a latorally projecting arm (53), terminating in a cylindrical lug This hip; (54) 'is dri led to receive the circular rod (55) which projects therefrom in a perpendicular direction, its central axis being parallel to that of the shaft (49), said rod passing clownward between the free end of leaf spring (46) and the end of control rod (39).

l lounted on the cylindrical base (52) of the turret- (50) and at right angles to the same, is a split sleeve (56) which may be closed by the set screw (57). Directly beneath'this split sleeve is a rearwardly exc lower turret (25) is stepped down s tending arm (58) ,at the extremity of which terminates in a cylindrical bearing 59), adapted to rotatably receive the control rod (60). The central axis of this bearing (59) corresponds with that of the split sleeve (56) which is positioned infront of it. The split sleeve (56) is drilled to slidably receive a shaft (61) from which projects alug (61), said lug preventing the shaft from turning within the sleeve Shaft (61') is tapped internally for the reception of a screw [(62) cut at the end of the control rod (60). The control rod (60) has a circular groove (63) cut in it for the reception of the machine screw (67 which prevents the rod (60) from having a longitudinal movement within the bearing (59), but permits'the rotation of the same, thus eifecting longitudinal movement of the shaft (61) within the split sleeve (56). At the front of this shaft is a flange (65) and to this flange is connected a circular disc (66) to which are attached clips (67 The whole combination forming a holder for there 7 {operation of. the control rod (40) and indefiector (68).

As shown in Fig. .1 all of the control rods project from the rear of the lamp house (4) and are equipped with suitable thumb Wheels and These thumb wheels are therefore shielded from the heat of the luminant which greatlyaids the operator in making necessary adjustments while the projector is in operation.

Besides the rotary movement which is imparted to the control rods, the lower control rods (16) and (17 have a horizontal movement, since they are carried back and forth by the carriage, and the upper control rods (60), (40) and (41) have'not only this additional horizontal movement but also a vertical and a-rcuate movement. It is therefore necessary to provide movable shields (7 5) and (76) on the rear Wall of the lamp house through which these rods project. The

shield is drilled at (77) and (78) for the reception of rods and and has in addition to this a slot for the projection of rod (60) which alsopassesthrough a small shield (76) superimposed upon the shield (7 5); It is necessary to use this super imposed shield since the relative position of the rods (4:0),(41) and (60) varies with the elevation of the upper turret (50). The coil spring (80) on control rod (60) presses against the shield (76) andthus holds bothshields against the rear'wall'of the lamp house. p

The operation of the device will now be described. 'The upper turret (50), the'lower' turret (25) and the cylindrical bearing i, which are mounted on the carriage are all telescopically -fitted,- oneTwith-in the other, so that any horizontal movement. of the carriage (1) moves both the lamp and the re fiecto-r in unison. Manipulationof -the-con ator.

trol rod (8) there-foreadvances or retards the entire lighting system within the lamp house either towards or away from'the condenser. Y

Since the upper turret is mounted within the angular relationship between the upper and lower turret is varied by means of the This control rod in concontrol rod (40). unction with the leaf spr1ngi( l6) provides a means for locking the upper and lower turret v at any desired angularity.

)Vhon the lower control rod (16) is turned the lower turret (25) is moved arcuately carrying with it the upper turret (50).

Any independent movement of the .upper turret (56) in an arcuate direction is effected by (8),' (16) and (17) control the movements or the lamp and reflector as a whole so that operation of any of these rods moves both the upper and lower turrets in unison, the rela two positions of the lamp and reflector with respect to each other remaining unchanged.

Thecoil spring (24) which ispositioned between the"oylindrical'bearing and the lower turret (25 counter-b al'ances the weight of the mechanism 'aboveit. The same applies for the coil spring (4-8) which is; positioned between the lower upper'turrets. The leaf springs (46) and (22) hold the upper and. lower turrets in" such a position that'the manipulation of the control rods (10) and (16) moves these turrets in an arcu- -ate direction without lost motion.

The control rods are arranged in a uniform manner so that thethumbwheels at the rear are convenientlylocated for the. oper- (74) controls the horizontal movement of the Operation ofthe extreme lower wheel lamp and the"reflectorin unison. The ex- 7 .treme upper wheel (69) controls the'hori- Zontal independent movement of the reflector. The centrally located wheels at the left control vertical movements; the lower (72) raises for lowers both the-lamp and the reflector alone The centrally located wheels at the right controlfthe arc'uate movements; the 7 lower (73) controls the movements of both the lamp and the reflector, andthe upper (71) controls the independent movementof t reflector.

Fromthe foregoingth'e extreme" simplicity of the constru'ction and ease of operation is evident. Interchangeability of parts, the elimination of back lash in the movements of the lamp and reflector and orderly and symmetrical arrangement of the control wheels and the many other new features embodied in this in *ention are all decided improvements over the mechanisms now in use.

Although in the foregoing certain elements have been described as best adapted to per form the functions allotted to them, nevertheless it is be understood that various minor changes ma be resorted to within the scope of the appended claims without departing from or sacrificing any of the principles of the invention.

Having described my invention, what I claim as new and wish to secure by Letters Patent is:

1. In a projection apparatus, superimposed turrets comprising a pair of axially aligned telescopically engaged shafts, a reflector on one and a radiant on the other, and means to impart independent arcuate movements to the shafts.

2. In a. projection apparatus, superimposed turrets comprising axially aligned telescopically engaged shafts, said telescopic engagement being such as to permit relative swivel movement of the shaft, 21 reflector on one of said shafts and a luminant on the other and means in connection with the respectiveshafts to effect their relative adjustment.

3. In a projection apparatus the combination of a movable carriage, a pair of telescopi cally engaged, axially aligned, relatively adjustable and swivelly connected turrets mounted on said carriage and means to impart a relative rotary and vertical movement to the turrets, a reflector on one turret and a radiant on the other.

l. In a projection apparatus the combination of alongitudinally movable carriage, a pair of telescopically engaged, axially aligned relatively adjustable and swivelly connected turrets mounted on said carriage and means to impart a relative rotary and vertical movement to the turrets and additional means to adjust the turrets as aunit, a reflector on one turret and a radiant on the other.

5. A projection apparatus comprising in combination a base, cylindrical bearings positioned on the base, a pair of super-imposed telescopically engaged shafts, the lower end of one of the shafts being slidably positioned in said bearing, means. in connection with the bearing and the lower end of the shaft thereinto impart vertical movement to the latter,

a reflector on one of the sha ts and an illuminating fixture on the other, and means to impart longitudinal movement to the base, said means comprising parallel guides, means carried by the base tocslidably engage the guides, a control rod, the inner end of the rod being in threaded engagement with the base.

6. In a projection apparatus the combination of upper and lower axially aligning and telescopically engaging shafts, means in connection with the respective shafts to effect arelative sliding movement therebetween, a supporting base, means in connection with the base to rotatably journal the lower end of said lower shaft, a reflector adjustably mounted on the upper and an illuminating fixture carried by the lower shaft.

7. A projection apparatus comprising in combination upper and lower axially aligned and telescopically engaged shafts, means for actuating the upper relative to the lower shaft, said means comprising a rack and pinion mechanism, a bearing rotatably journalling the lower end of said lower shaft, a reflector adjustably mounted on the upper and an illuminating fixture carried by the lower shaft.

8. A projection apparatus comprising in combination a pair of axially aligned telescopic shafts, said shafts being interconnected for swivel movement, means coacting with the upper shaft to swivel the latter in one direction, additional means in connection with said shaft to automatically restore said shaft to its initial position, means for verti cally adjusI the upper with res acct to the lower shaft, a reflector affixed to said shaft, an illuminatin fixture carried by the lower shaft and a bearing rotatably journalling the lower end of said lower shaft.

9. [1 projection apparatus comprising in combination a pair of axially aligning telescopically engaging upper and lower shafts, a. bearing rotatably j ournalling the lower end of said lower shaft, means in connection with said bearing to effect rotation of the shaft in one direction, additional means carried by the shaft to restorethe latter to its initial po sition, a reflector affixed to the upper and an illuminating device secured to said lower shaft. I

10. In a projection apparatus, super-imposed turrets comprising a pair of rotatably connected and telescopically engaged shafts, a reflector on one and a radiant on the other and means in connection with the respective shafts to impart joint and independent rotary movements thereto.

11. In a projection apparatus, super-imposed turrets comprising a pair of rotatably connected and telescopically engaged shafts, a reflector adjustably mounted on one of said shafts and a radiant on the other and means in connection with the respective shafts to impart joint and independent rotary movements thereto. v

12. In a projection apparatus, super-imposed turrets comprising a pair of rotatably connected and telescopically engaged shafts, a reflector longitudinally adjustable on one 'of said shafts and a radiant carried by the other and means in connection with the respective shafts to impart joint and independent rotary movements thereto.

13. In a. projection apparatus, super-imposed turrets comprising a pair of rotatably connected and slidably engaged shafts, a reflector on one and a radiant on the other, means in connection with the respective shafts to impart joint and independent rotary movements thereto and additional means in connection with said shafts to effect a lengthwise movement therebetween. V.

14. In a projection apparatus, super-imposed turrets comprising a pair of rotatably connected and slidably engaged shafts, said shafts being operable independently and in unison, a reflector on one and a radiant on the other, means to impart a rotary movement to said shafts as a unit and additional means in connection with said shafts to effect their lengthwise movement as a unit.

15. In a projection apparatus, super-imposed turrets comprising a pair of rotatably connected and slidably engaged shafts, a reflector on'one and a radiant on the other,

means in connection with the respective shafts to impart joint and independent ro tary movement thereto,'and additional means in connection with said shafts to effect arelative lengthwise movement therebetween.

16. In a projection apparatus, super-imposed turrets comprising apair of rotatably connected and slidably engaged shafts, a. reflector on one and a radiant on the other, means in connection with the respective shafts to impart joint and independent'rd tary movements thereto, additional means in connection with said shafts to effect a relative in lengthwise movement therebetween and a spring encircling one of the shafts and disposed between said turrets, said spring contributing to the adjustment of the turrets when their shafts are relatively adjusted lengthwise in one direction.

' ROGER M. 'HILL. 

